(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction

a substance formed during a chemical process before the desired product is obtained

lying between two extremes in time or space or degree; "going from sitting to standing without intermediate pushes with the hands"; "intermediate stages in a process"; "intermediate stops on the route"; "an intermediate level"

melt (fat or lard) in order to separate out impurities; "try the yak butter"; "render fat in a casserole"

test the limits of; "You are trying my patience!"

give pain or trouble to; "I've been sorely tried by these students"

make an effort or attempt; "He tried to shake off his fears"; "The infant had essayed a few wobbly steps"; "The police attempted to stop the thief"; "He sought to improve himself"; "She always seeks to do good in the world"

point out or draw attention to in protest or remonstrance; "our parents represented to us the need for more caution"

describe or present, usually with respect to a particular quality; "He represented this book as an example of the Russian 19th century novel"

serve as a means of expressing something; "The flower represents a young girl"

create an image or likeness of; "The painter represented his wife as a young girl"

be a delegate or spokesperson for; represent somebody's interest or be a proxy or substitute for, as of politicians and office holders representing their constituents, or of a tenant representing other tenants in a housing dispute; "I represent the silent majority"

be representative or typical for; "This period is represented by Beethoven"

take the place of or be parallel or equivalent to; "Because of the sound changes in the course of history, an 'h' in Greek stands for an 's' in Latin"